Tire.



G. A. STEWART & H. E. GOODELL.

v TIRE.

APPLIOATION FILED JAN. 23. 1912.

Patented Feb. 18,1913.

aryaid [211/0 174/310 Witnesse's' Attorneys UNITED sTA'rns PATENT OFFICE.

GEORGE A, STEWART AND HARLAN E. GOODELI 0F RIDLEY PARK, PENNSYLVANIA.

TIRE.

Sp c n of Letters nt Patented Feb. 18, 19 13.

Application filed January 23, 1912. Serial N 0. 672,845.

To all 101mm 2' t may concern The present invention aims ,to provide a tire which will possess the resiliency of the standard pneumatic tire, the improved tire. hein more durable than the standard tire,

and eing less liable to puncture.

A further objectof the invention is to provide a tire which is reinforced at the tread, and between the auxiliary air chambers, thereby to resist puncture and cutting.

The invention aims further to provide a tire having a comparatively narrow tread rib, whereby the weight will be carried by the mainfcentral air chamber, so that the tire will be permitted to yield at its' sides, the auxiliary air chambers permitting such yielding. v

A further object of the invention is to provide a tire having auxiliary, side air chambers, permitting the cross sectional area of the inner tube to be reduced.

A. furtherobj'ect of the invention is to provide a tire in which an intermediate case is made eflicient. to define the side air chambers, and further made etlicient as a means for reinforcing the tread rib.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can be made within the scope of what is claimed without deiparting from the spirit of the invention,

.3 may be of any desired form, and about the beads 3, the edges of the inner case 2 are carried, outwardly, as shown at 4, the rim 5 being constructed in any desired manner, so as to interlock properly with the heads 3.

Surrounding the inner case 2 is a'tread 6, preferably fashioned from rubber; the

tread 6 terminating, as shown at 7, adjacent the rim 5. At the periphery of the tire, the

jected' toward the axis of the tire, into engagement with the innercase 2.

Located between the tread 6 and the inner 1 case 2 is an intermediate case9, which is a layer 11, these layers being preferably fashioned from fabric. The layers'lt) and 11 are in contact, adjacent the rim 5, as shown at- 12, the portions 12 of the layers 10 and 11 being held in close and intimate contact between the tread 6 and the inner case 2. At a point approximately opposite to the axis of the tire, the layers 10' and 11 diverge, as shown at 14, to define air spaces 15, located at opposite sides of 'the central air chamber of the tire. In the auxiliary fair chambers 15, tubes 16, preferably although not necessarily fashioned from fabric, may be placed. Between the air chambers 15 and the median plane of the tire, the layer 11 of the intermediate case is in contact with the inner case 2, as shown at 17. The extremities of the inner layers 11 are carried radially, as shown at 18, into the tread rib 8, so as to reinforce the same, the outer layer 10 being carried in a continuous length, circumferentially of the tire, and through the tread rib 8, the layers 11 and 10 contacting, preferably, adjacent the periphery of the tire, as shown at 20.

The trend rib 8, under ordinary circumstances, tends to carry the weight into. the inner case 2, the periphery of the tire being thus relievedJof strain, upon both sides of the tread 8, fit the points at which the reference characters 21 are applied. The auxiliary air chambers 15, therefore, underv normal conditions, are relieved of a great portion of the weight of the vehicle.

In present practice, the tires are frequently injured by reason of the fact that obstructions engage the tire adjacent the points- 21,

the foregoing being notably true, when the tire is traversing a channeled railroad rail or like structure, having parallel flanges which engage the tire upon both sides of the tread rib 8. Tn a tire as herein disclosed, such a structure will not cut .or injure the tire. by reason of the fact that-the air chambers 15 are provided, the tread rib 8 carry- 60 tread 6 is equipped with a tread rib 8, pro-.

ing' the major portion of the weight of the vehicle, and thus leaving the air chambers 15 free to receive the additional strain imother obstacle which indent-s the tire upon either side of the tread rib 8.

Attention is directed to the-fact that the auxiliary chambers 15 xtend uninterruptvedly across two parallel lines A-B and 'GD, both of which are at right angles to the median plane E-F of the tire, the line A- B being, tangential to the outer face of the case 2, and the line (1-1) passing through the inner chamber of the tire. Owing to this disposition of the air chambers 15 with respect to the lines AB and CD, and owing to the fact that there are no intermediate supporting ribs in the chambers 15, the chambers extending *unbrokenly across the lines A B and CD, the chainbers will be free to yield when an obstacle of the nature heminbeforedeseribed, is encountered.

The auxiliary chambers 15 receive the major portion or the shock incident to traversinp, the channeled rail, or encountering a like obstruction, and by reason of this fact, the fiexurc of the inner case 2 is reduced to a minimum, thereby preventing a separation of the constituent layers of the inner case.

The tread t3 obviously prevents the fabric cases 2 and 9 from being. saturated by moisture, and a reinforcing layer of fabric 22, interposed in the tread 6, adjacent the periphery of the tire, serves to reinforce the tread, and to render the device less liable to puncture.

Having thus described the invention, what is claimed is:

1.- A tire comprising an inner case; a tread having a rib engaging the inner case at the periphery of the inner case; and an intermediate case located between the tread and the inner case, the intermediate case consisting of an outer layer and a pair of inner layers, the inner layers diverging from the outer layer, to form auxiliary air chan'ibers at the sides of the tire, the outer layer being extended circumferentially of the tire, hrough thc rib, and the inner layer being carried into the rib radially of the tire, and between theauxiliary air chambers, to reinforce the rib.

2. A tire comprising an inner case; a tread having, a rib engaging the inner case at the periphery of the tire; and an intermediate case consisting of inner and outer members, spaced apart in their intermediate portions, to define air chambers at the sides of the tire, the inner and outer layers being engaged in the rib, and having their ends held in close contact, by and between the tread and the inner case.

In testimony that we claim. the foregoing as our own, we have hereto ailixed our signatures in the presence of two witnesses.

GEORGE A. STEWART. HARLAN E. GOODELL. W'itnesses 7H. R. TRAINER, Einvoou W. VVnnn. 

